Re: [Discuss-gnuradio] dB or dBm

[Ron Economos]

-20 dBm is a pretty strong signal. You're probably over driving your SDR 
into compression. I would use a larger value attenuator or reduce the 
levels from the signal generator.

Ron

On 06/21/2017 08:55 AM, GNUBeginner wrote:
> Thank you for your detailed message. Please correct me if I am on the wrong
> path.
>
> I am injecting 802.11g signal using Vector Signal Generator at different
> power levels (0 dBm, -5 dBm, -10 dBm, -15 dBm and -20 dBm) using 20 dB
> attenuator. After running gr-scan with RF gain 0 dB option at the first
> center frequency for this OFDM signal which is 2412 MHz, I am seeing the
> following dB results respectively:
>
> -49.37 dB
> -49.54 dB
> -50.23 dB
> -53.58 dB
> -58.52 dB
>
> I am also planning to continue the same experiment using the other two
> center frequency options which are 2437 MHz and 2462 MHz.
>
> I would appreciate if you could please tell me what I am doing wrong. I am
> using modified gr-scan code which has the RF Gain option included by zelfie.
>
> Thanks
>
>
>
> --
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>
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